Best Selling Products

Our Best Selling Products category features the most popular and trusted water testing solutions chosen by professionals and everyday users alike. From quick and easy test kits to advanced meters and reagents, these products have earned their place as customer favourites for their reliability, accuracy, and ease of use. Whether you’re testing pool water, drinking water, or industrial systems, these top picks deliver the dependable results you can count on.

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4195 products

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LaMotte Insta-Test - Nitrate & Nitrite Test Strips Expiry 11/25LaMotte Insta-Test - Nitrate & Nitrite Test Strips Expiry 11/25
LaMotte
LaMotte Insta-Test - Nitrate & Nitrite Test Strips Expiry 11/25 Sale price£2.99 Regular price£20.00
Save £14.21
LaMotte Insta-Test Copper Test Strips Expiry 02/26LaMotte Insta-Test Copper Test Strips Expiry 02/26
Lamotte
LaMotte Insta-Test Copper Test Strips Expiry 02/26 Sale price£2.99 Regular price£17.20
Lovibond
Lovibond Reference Standard Kit pH - 7.45 (MD150) Sale price£75.99 Regular price£86.35
Save £17.10
HACH Iron Test Strips 0-5 mg/L Expiry 04/26
Hach
HACH Iron Test Strips 0-5 mg/L Expiry 04/26 Sale price£2.99 Regular price£20.09
Save £52.10
LEADQuick Water Reagent Set Expiry03/26LEADQuick Water Reagent Set Expiry03/26
ITS
LEADQuick Water Reagent Set Expiry03/26 Sale price£9.99 Regular price£62.09
Save £7.41
Lovibond DPD No 1 Free Chlorine Liquid Reagent A Expiry 03/26
Lovibond
Lovibond DPD No 1 Free Chlorine Liquid Reagent A Expiry 03/26 Sale price£2.99 Regular price£10.40
Save £25.67
Lovibond Test Strips Plastic pH 0-14 Expiry 03/26Lovibond Test Strips Plastic pH 0-14 Expiry 03/26
Lovibond
Lovibond Test Strips Plastic pH 0-14 Expiry 03/26 Sale price£5.99 Regular price£31.66
LaMotte Insta-Test Nitrate Test Strips Expiry 03/26
LaMotte
LaMotte Insta-Test Nitrate Test Strips Expiry 03/26 Sale price£2.99
Save £68.01
IDEXX 120ml Vessels with Antifoam (200 pack) Expiry 03/26
IDEXX
IDEXX 120ml Vessels with Antifoam (200 pack) Expiry 03/26 Sale price£99.99 Regular price£168.00
Save £28.51
Hanna Instruments-93711-01 Total Chlorine Reagent, DPD Method Expiry 03/26Hanna Instruments-93711-01 Total Chlorine Reagent, DPD Method Expiry 03/26
Hanna Instruments
Hanna Instruments-93711-01 Total Chlorine Reagent, DPD Method Expiry 03/26 Sale price£4.99 Regular price£33.50
Nutrient Agar with TTC* and Malt Extract Agar Expiry 02/26
TEST ALL WATER
Nutrient Agar with TTC* and Malt Extract Agar Expiry 02/26 Sale price£2.99
LaMotte Iron Test Strips Expiry 02/26
LaMotte
LaMotte Iron Test Strips Expiry 02/26 Sale price£2.99
Save £3.33
LaMotte Insta-Test 2984 Hydrogen Peroxide HR Test Strip, 0-90ppm Range expiry 02/26
LaMotte
LaMotte Insta-Test 2984 Hydrogen Peroxide HR Test Strip, 0-90ppm Range expiry 02/26 Sale price£2.99 Regular price£6.32
LaMotte Cyanuric Acid ColorQ TesTabs Expiry 02/26LaMotte Cyanuric Acid ColorQ TesTabs Expiry 02/26
Lamotte
LaMotte Cyanuric Acid ColorQ TesTabs Expiry 02/26 Sale price£8.00
Save £22.17
LaMotte Copper & Iron Metals Test Strip Kit Expiry date 02/26
LaMotte
LaMotte Copper & Iron Metals Test Strip Kit Expiry date 02/26 Sale price£9.99 Regular price£32.16
Save £46.50
Idexx EasyDisc PCA for 1ml sample Expiry 30/01/25
IDEXX
Idexx EasyDisc PCA for 1ml sample Expiry 30/01/25 Sale price£46.50 Regular price£93.00
Save £20.30
Hanna Instruments-3833 Phosphate test kit expiry 11/2025Hanna Instruments-3833 Phosphate test kit expiry 11/2025
Hanna Instruments
Hanna Instruments-3833 Phosphate test kit expiry 11/2025 Sale price£10.00 Regular price£30.30
HACH COD cuvette test - ISO 15705, 0-1000 mg/L O₂HACH COD cuvette test - ISO 15705, 0-1000 mg/L O₂
HACH
HACH COD cuvette test - ISO 15705, 0-1000 mg/L O₂ Sale price£94.80
HACH COD cuvette test (ISO 15705), 0-1000 mg/L, for AP3900 Laboratory Robot
HACH
HACH COD cuvette test (ISO 15705), 0-1000 mg/L, for AP3900 Laboratory Robot Sale price£544.00
HACH Nitrite cuvette test 0.6-6.0 mg/L NO₂-N, 25 testsHACH Nitrite cuvette test 0.6-6.0 mg/L NO₂-N, 25 tests
HACH
HACH Nitrite cuvette test 0.6-6.0 mg/L NO₂-N, 25 tests Sale price£105.00
HACH Ammonium cuvette test 2.0-47.0 mg/L NH₄-N, 25 testsHACH Ammonium cuvette test 2.0-47.0 mg/L NH₄-N, 25 tests
HACH
HACH Ammonium cuvette test 2.0-47.0 mg/L NH₄-N, 25 tests Sale price£123.00
Trace2o
Photometer Reagents, Chlorine DPD1+3 (Free + Total) Trace2o Sale price£15.89
Trace2o
Trace2o Photometer Reagents, Chlorine DPD1 (Free) Sale priceFrom £7.94
Save £30.00
Lovibond MD150 13 Parameters in photometerLovibond MD150 13 Parameters in photometer
Lovibond
Lovibond MD150 13 Parameters in photometer Sale price£669.03 Regular price£699.03

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